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inet: stop leaking jiffies on the wire
[linux/fpc-iii.git] / include / target / target_core_base.h
blob0eed9fd79ea553bf03699c4148136f492fe056ec
1 #ifndef TARGET_CORE_BASE_H
2 #define TARGET_CORE_BASE_H
3
4 #include <linux/in.h>
5 #include <linux/configfs.h>
6 #include <linux/dma-mapping.h>
7 #include <linux/blkdev.h>
8 #include <linux/percpu_ida.h>
9 #include <linux/t10-pi.h>
10 #include <net/sock.h>
11 #include <net/tcp.h>
12
13 #define TARGET_CORE_VERSION "v5.0"
14
15 /*
16 * Maximum size of a CDB that can be stored in se_cmd without allocating
17 * memory dynamically for the CDB.
18 */
19 #define TCM_MAX_COMMAND_SIZE 32
20 /*
21 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
22 * defined 96, but the real limit is 252 (or 260 including the header)
23 */
24 #define TRANSPORT_SENSE_BUFFER 96
25 /* Used by transport_send_check_condition_and_sense() */
26 #define SPC_SENSE_KEY_OFFSET 2
27 #define SPC_ADD_SENSE_LEN_OFFSET 7
28 #define SPC_DESC_TYPE_OFFSET 8
29 #define SPC_ADDITIONAL_DESC_LEN_OFFSET 9
30 #define SPC_VALIDITY_OFFSET 10
31 #define SPC_ASC_KEY_OFFSET 12
32 #define SPC_ASCQ_KEY_OFFSET 13
33 #define TRANSPORT_IQN_LEN 224
34 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
35 #define LU_GROUP_NAME_BUF 256
36 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
37 #define TG_PT_GROUP_NAME_BUF 256
38 /* Used to parse VPD into struct t10_vpd */
39 #define VPD_TMP_BUF_SIZE 254
40 /* Used by transport_generic_cmd_sequencer() */
41 #define READ_BLOCK_LEN 6
42 #define READ_CAP_LEN 8
43 #define READ_POSITION_LEN 20
44 #define INQUIRY_LEN 36
45 /* Used by transport_get_inquiry_vpd_serial() */
46 #define INQUIRY_VPD_SERIAL_LEN 254
47 /* Used by transport_get_inquiry_vpd_device_ident() */
48 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
49
50 /* Attempts before moving from SHORT to LONG */
51 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
52 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
53 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
54
55 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
56
57 /* struct se_dev_attrib sanity values */
58 /* Default max_unmap_lba_count */
59 #define DA_MAX_UNMAP_LBA_COUNT 0
60 /* Default max_unmap_block_desc_count */
61 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
62 /* Default unmap_granularity */
63 #define DA_UNMAP_GRANULARITY_DEFAULT 0
64 /* Default unmap_granularity_alignment */
65 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
66 /* Default max_write_same_len, disabled by default */
67 #define DA_MAX_WRITE_SAME_LEN 0
68 /* Use a model alias based on the configfs backend device name */
69 #define DA_EMULATE_MODEL_ALIAS 0
70 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
71 #define DA_EMULATE_WRITE_CACHE 0
72 /* Emulation for UNIT ATTENTION Interlock Control */
73 #define DA_EMULATE_UA_INTLLCK_CTRL 0
74 /* Emulation for TASK_ABORTED status (TAS) by default */
75 #define DA_EMULATE_TAS 1
76 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
77 #define DA_EMULATE_TPU 0
78 /*
79 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
80 * block/blk-lib.c:blkdev_issue_discard()
81 */
82 #define DA_EMULATE_TPWS 0
83 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */
84 #define DA_EMULATE_CAW 1
85 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */
86 #define DA_EMULATE_3PC 1
87 /* No Emulation for PSCSI by default */
88 #define DA_EMULATE_ALUA 0
89 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
90 #define DA_ENFORCE_PR_ISIDS 1
91 /* Force SPC-3 PR Activate Persistence across Target Power Loss */
92 #define DA_FORCE_PR_APTPL 0
93 #define DA_STATUS_MAX_SECTORS_MIN 16
94 #define DA_STATUS_MAX_SECTORS_MAX 8192
95 /* By default don't report non-rotating (solid state) medium */
96 #define DA_IS_NONROT 0
97 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
98 #define DA_EMULATE_REST_REORD 0
99
100 #define SE_INQUIRY_BUF 1024
101 #define SE_MODE_PAGE_BUF 512
102 #define SE_SENSE_BUF 96
103
104 /* struct se_hba->hba_flags */
105 enum hba_flags_table {
106 HBA_FLAGS_INTERNAL_USE = 0x01,
107 HBA_FLAGS_PSCSI_MODE = 0x02,
108 };
109
110 /* Special transport agnostic struct se_cmd->t_states */
111 enum transport_state_table {
112 TRANSPORT_NO_STATE = 0,
113 TRANSPORT_NEW_CMD = 1,
114 TRANSPORT_WRITE_PENDING = 3,
115 TRANSPORT_PROCESSING = 5,
116 TRANSPORT_COMPLETE = 6,
117 TRANSPORT_ISTATE_PROCESSING = 11,
118 TRANSPORT_COMPLETE_QF_WP = 18,
119 TRANSPORT_COMPLETE_QF_OK = 19,
120 };
121
122 /* Used for struct se_cmd->se_cmd_flags */
123 enum se_cmd_flags_table {
124 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
125 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
126 SCF_EMULATED_TASK_SENSE = 0x00000004,
127 SCF_SCSI_DATA_CDB = 0x00000008,
128 SCF_SCSI_TMR_CDB = 0x00000010,
129 SCF_FUA = 0x00000080,
130 SCF_SE_LUN_CMD = 0x00000100,
131 SCF_BIDI = 0x00000400,
132 SCF_SENT_CHECK_CONDITION = 0x00000800,
133 SCF_OVERFLOW_BIT = 0x00001000,
134 SCF_UNDERFLOW_BIT = 0x00002000,
135 SCF_SEND_DELAYED_TAS = 0x00004000,
136 SCF_ALUA_NON_OPTIMIZED = 0x00008000,
137 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
138 SCF_COMPARE_AND_WRITE = 0x00080000,
139 SCF_COMPARE_AND_WRITE_POST = 0x00100000,
140 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
141 SCF_ACK_KREF = 0x00400000,
142 SCF_TASK_ATTR_SET = 0x01000000,
143 };
144
145 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
146 enum transport_lunflags_table {
147 TRANSPORT_LUNFLAGS_READ_ONLY = 0x01,
148 TRANSPORT_LUNFLAGS_READ_WRITE = 0x02,
149 };
150
151 /*
152 * Used by transport_send_check_condition_and_sense()
153 * to signal which ASC/ASCQ sense payload should be built.
154 */
155 typedef unsigned __bitwise__ sense_reason_t;
156
157 enum tcm_sense_reason_table {
158 #define R(x) (__force sense_reason_t )(x)
159 TCM_NO_SENSE = R(0x00),
160 TCM_NON_EXISTENT_LUN = R(0x01),
161 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
162 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
163 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
164 TCM_SERVICE_CRC_ERROR = R(0x05),
165 TCM_SNACK_REJECTED = R(0x06),
166 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
167 TCM_INVALID_CDB_FIELD = R(0x08),
168 TCM_INVALID_PARAMETER_LIST = R(0x09),
169 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
170 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
171 TCM_WRITE_PROTECTED = R(0x0c),
172 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
173 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
174 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
175 TCM_RESERVATION_CONFLICT = R(0x10),
176 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
177 TCM_OUT_OF_RESOURCES = R(0x12),
178 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
179 TCM_MISCOMPARE_VERIFY = R(0x14),
180 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
181 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
182 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
183 TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18),
184 #undef R
185 };
186
187 enum target_sc_flags_table {
188 TARGET_SCF_BIDI_OP = 0x01,
189 TARGET_SCF_ACK_KREF = 0x02,
190 TARGET_SCF_UNKNOWN_SIZE = 0x04,
191 };
192
193 /* fabric independent task management function values */
194 enum tcm_tmreq_table {
195 TMR_ABORT_TASK = 1,
196 TMR_ABORT_TASK_SET = 2,
197 TMR_CLEAR_ACA = 3,
198 TMR_CLEAR_TASK_SET = 4,
199 TMR_LUN_RESET = 5,
200 TMR_TARGET_WARM_RESET = 6,
201 TMR_TARGET_COLD_RESET = 7,
202 TMR_UNKNOWN = 0xff,
203 };
204
205 /* fabric independent task management response values */
206 enum tcm_tmrsp_table {
207 TMR_FUNCTION_FAILED = 0,
208 TMR_FUNCTION_COMPLETE = 1,
209 TMR_TASK_DOES_NOT_EXIST = 2,
210 TMR_LUN_DOES_NOT_EXIST = 3,
211 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
212 TMR_FUNCTION_REJECTED = 5,
213 };
214
215 /*
216 * Used for target SCSI statistics
217 */
218 typedef enum {
219 SCSI_INST_INDEX,
220 SCSI_DEVICE_INDEX,
221 SCSI_AUTH_INTR_INDEX,
222 SCSI_INDEX_TYPE_MAX
223 } scsi_index_t;
224
225 struct se_cmd;
226
227 struct t10_alua_lba_map_member {
228 struct list_head lba_map_mem_list;
229 int lba_map_mem_alua_state;
230 int lba_map_mem_alua_pg_id;
231 };
232
233 struct t10_alua_lba_map {
234 u64 lba_map_first_lba;
235 u64 lba_map_last_lba;
236 struct list_head lba_map_list;
237 struct list_head lba_map_mem_list;
238 };
239
240 struct t10_alua {
241 /* ALUA Target Port Group ID */
242 u16 alua_tg_pt_gps_counter;
243 u32 alua_tg_pt_gps_count;
244 /* Referrals support */
245 spinlock_t lba_map_lock;
246 u32 lba_map_segment_size;
247 u32 lba_map_segment_multiplier;
248 struct list_head lba_map_list;
249 spinlock_t tg_pt_gps_lock;
250 struct se_device *t10_dev;
251 /* Used for default ALUA Target Port Group */
252 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
253 /* Used for default ALUA Target Port Group ConfigFS group */
254 struct config_group alua_tg_pt_gps_group;
255 struct list_head tg_pt_gps_list;
256 };
257
258 struct t10_alua_lu_gp {
259 u16 lu_gp_id;
260 int lu_gp_valid_id;
261 u32 lu_gp_members;
262 atomic_t lu_gp_ref_cnt;
263 spinlock_t lu_gp_lock;
264 struct config_group lu_gp_group;
265 struct list_head lu_gp_node;
266 struct list_head lu_gp_mem_list;
267 };
268
269 struct t10_alua_lu_gp_member {
270 bool lu_gp_assoc;
271 atomic_t lu_gp_mem_ref_cnt;
272 spinlock_t lu_gp_mem_lock;
273 struct t10_alua_lu_gp *lu_gp;
274 struct se_device *lu_gp_mem_dev;
275 struct list_head lu_gp_mem_list;
276 };
277
278 struct t10_alua_tg_pt_gp {
279 u16 tg_pt_gp_id;
280 int tg_pt_gp_valid_id;
281 int tg_pt_gp_alua_supported_states;
282 int tg_pt_gp_alua_pending_state;
283 int tg_pt_gp_alua_previous_state;
284 int tg_pt_gp_alua_access_status;
285 int tg_pt_gp_alua_access_type;
286 int tg_pt_gp_nonop_delay_msecs;
287 int tg_pt_gp_trans_delay_msecs;
288 int tg_pt_gp_implicit_trans_secs;
289 int tg_pt_gp_pref;
290 int tg_pt_gp_write_metadata;
291 u32 tg_pt_gp_members;
292 atomic_t tg_pt_gp_alua_access_state;
293 atomic_t tg_pt_gp_ref_cnt;
294 spinlock_t tg_pt_gp_lock;
295 struct mutex tg_pt_gp_md_mutex;
296 struct se_device *tg_pt_gp_dev;
297 struct config_group tg_pt_gp_group;
298 struct list_head tg_pt_gp_list;
299 struct list_head tg_pt_gp_lun_list;
300 struct se_lun *tg_pt_gp_alua_lun;
301 struct se_node_acl *tg_pt_gp_alua_nacl;
302 struct work_struct tg_pt_gp_transition_work;
303 struct completion *tg_pt_gp_transition_complete;
304 };
305
306 struct t10_vpd {
307 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
308 int protocol_identifier_set;
309 u32 protocol_identifier;
310 u32 device_identifier_code_set;
311 u32 association;
312 u32 device_identifier_type;
313 struct list_head vpd_list;
314 };
315
316 struct t10_wwn {
317 char vendor[8];
318 char model[16];
319 char revision[4];
320 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
321 spinlock_t t10_vpd_lock;
322 struct se_device *t10_dev;
323 struct config_group t10_wwn_group;
324 struct list_head t10_vpd_list;
325 };
326
327 struct t10_pr_registration {
328 /* Used for fabrics that contain WWN+ISID */
329 #define PR_REG_ISID_LEN 16
330 /* PR_REG_ISID_LEN + ',i,0x' */
331 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
332 char pr_reg_isid[PR_REG_ISID_LEN];
333 /* Used during APTPL metadata reading */
334 #define PR_APTPL_MAX_IPORT_LEN 256
335 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
336 /* Used during APTPL metadata reading */
337 #define PR_APTPL_MAX_TPORT_LEN 256
338 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
339 u16 pr_aptpl_rpti;
340 u16 pr_reg_tpgt;
341 /* Reservation effects all target ports */
342 int pr_reg_all_tg_pt;
343 /* Activate Persistence across Target Power Loss */
344 int pr_reg_aptpl;
345 int pr_res_holder;
346 int pr_res_type;
347 int pr_res_scope;
348 /* Used for fabric initiator WWPNs using a ISID */
349 bool isid_present_at_reg;
350 u64 pr_res_mapped_lun;
351 u64 pr_aptpl_target_lun;
352 u16 tg_pt_sep_rtpi;
353 u32 pr_res_generation;
354 u64 pr_reg_bin_isid;
355 u64 pr_res_key;
356 atomic_t pr_res_holders;
357 struct se_node_acl *pr_reg_nacl;
358 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
359 struct se_dev_entry *pr_reg_deve;
360 struct list_head pr_reg_list;
361 struct list_head pr_reg_abort_list;
362 struct list_head pr_reg_aptpl_list;
363 struct list_head pr_reg_atp_list;
364 struct list_head pr_reg_atp_mem_list;
365 };
366
367 struct t10_reservation {
368 /* Reservation effects all target ports */
369 int pr_all_tg_pt;
370 /* Activate Persistence across Target Power Loss enabled
371 * for SCSI device */
372 int pr_aptpl_active;
373 #define PR_APTPL_BUF_LEN 262144
374 u32 pr_generation;
375 spinlock_t registration_lock;
376 spinlock_t aptpl_reg_lock;
377 /*
378 * This will always be set by one individual I_T Nexus.
379 * However with all_tg_pt=1, other I_T Nexus from the
380 * same initiator can access PR reg/res info on a different
381 * target port.
382 *
383 * There is also the 'All Registrants' case, where there is
384 * a single *pr_res_holder of the reservation, but all
385 * registrations are considered reservation holders.
386 */
387 struct se_node_acl *pr_res_holder;
388 struct list_head registration_list;
389 struct list_head aptpl_reg_list;
390 };
391
392 struct se_tmr_req {
393 /* Task Management function to be performed */
394 u8 function;
395 /* Task Management response to send */
396 u8 response;
397 int call_transport;
398 /* Reference to ITT that Task Mgmt should be performed */
399 u64 ref_task_tag;
400 void *fabric_tmr_ptr;
401 struct se_cmd *task_cmd;
402 struct se_device *tmr_dev;
403 struct se_lun *tmr_lun;
404 struct list_head tmr_list;
405 };
406
407 enum target_prot_op {
408 TARGET_PROT_NORMAL = 0,
409 TARGET_PROT_DIN_INSERT = (1 << 0),
410 TARGET_PROT_DOUT_INSERT = (1 << 1),
411 TARGET_PROT_DIN_STRIP = (1 << 2),
412 TARGET_PROT_DOUT_STRIP = (1 << 3),
413 TARGET_PROT_DIN_PASS = (1 << 4),
414 TARGET_PROT_DOUT_PASS = (1 << 5),
415 };
416
417 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
418 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
419 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
420
421 enum target_prot_type {
422 TARGET_DIF_TYPE0_PROT,
423 TARGET_DIF_TYPE1_PROT,
424 TARGET_DIF_TYPE2_PROT,
425 TARGET_DIF_TYPE3_PROT,
426 };
427
428 enum target_core_dif_check {
429 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
430 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
431 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
432 };
433
434 /* for sam_task_attr */
435 #define TCM_SIMPLE_TAG 0x20
436 #define TCM_HEAD_TAG 0x21
437 #define TCM_ORDERED_TAG 0x22
438 #define TCM_ACA_TAG 0x24
439
440 struct se_cmd {
441 /* SAM response code being sent to initiator */
442 u8 scsi_status;
443 u8 scsi_asc;
444 u8 scsi_ascq;
445 u16 scsi_sense_length;
446 unsigned cmd_wait_set:1;
447 unsigned unknown_data_length:1;
448 bool state_active:1;
449 u64 tag; /* SAM command identifier aka task tag */
450 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
451 int alua_nonop_delay;
452 /* See include/linux/dma-mapping.h */
453 enum dma_data_direction data_direction;
454 /* For SAM Task Attribute */
455 int sam_task_attr;
456 /* Used for se_sess->sess_tag_pool */
457 unsigned int map_tag;
458 /* Transport protocol dependent state, see transport_state_table */
459 enum transport_state_table t_state;
460 /* See se_cmd_flags_table */
461 u32 se_cmd_flags;
462 /* Total size in bytes associated with command */
463 u32 data_length;
464 u32 residual_count;
465 u64 orig_fe_lun;
466 /* Persistent Reservation key */
467 u64 pr_res_key;
468 /* Used for sense data */
469 void *sense_buffer;
470 struct list_head se_delayed_node;
471 struct list_head se_qf_node;
472 struct se_device *se_dev;
473 struct se_lun *se_lun;
474 /* Only used for internal passthrough and legacy TCM fabric modules */
475 struct se_session *se_sess;
476 struct se_tmr_req *se_tmr_req;
477 struct list_head se_cmd_list;
478 struct completion cmd_wait_comp;
479 const struct target_core_fabric_ops *se_tfo;
480 sense_reason_t (*execute_cmd)(struct se_cmd *);
481 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
482 void *protocol_data;
483
484 unsigned char *t_task_cdb;
485 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
486 unsigned long long t_task_lba;
487 unsigned int t_task_nolb;
488 unsigned int transport_state;
489 #define CMD_T_ABORTED (1 << 0)
490 #define CMD_T_ACTIVE (1 << 1)
491 #define CMD_T_COMPLETE (1 << 2)
492 #define CMD_T_SENT (1 << 4)
493 #define CMD_T_STOP (1 << 5)
494 #define CMD_T_DEV_ACTIVE (1 << 7)
495 #define CMD_T_REQUEST_STOP (1 << 8)
496 #define CMD_T_BUSY (1 << 9)
497 #define CMD_T_TAS (1 << 10)
498 #define CMD_T_FABRIC_STOP (1 << 11)
499 #define CMD_T_PRE_EXECUTE (1 << 12)
500 spinlock_t t_state_lock;
501 struct kref cmd_kref;
502 struct completion t_transport_stop_comp;
503
504 struct work_struct work;
505
506 struct scatterlist *t_data_sg;
507 struct scatterlist *t_data_sg_orig;
508 unsigned int t_data_nents;
509 unsigned int t_data_nents_orig;
510 void *t_data_vmap;
511 struct scatterlist *t_bidi_data_sg;
512 unsigned int t_bidi_data_nents;
513
514 /* Used for lun->lun_ref counting */
515 int lun_ref_active;
516
517 struct list_head state_list;
518
519 /* old task stop completion, consider merging with some of the above */
520 struct completion task_stop_comp;
521
522 /* backend private data */
523 void *priv;
524
525 /* DIF related members */
526 enum target_prot_op prot_op;
527 enum target_prot_type prot_type;
528 u8 prot_checks;
529 bool prot_pto;
530 u32 prot_length;
531 u32 reftag_seed;
532 struct scatterlist *t_prot_sg;
533 unsigned int t_prot_nents;
534 sense_reason_t pi_err;
535 sector_t bad_sector;
536 };
537
538 struct se_ua {
539 u8 ua_asc;
540 u8 ua_ascq;
541 struct list_head ua_nacl_list;
542 };
543
544 struct se_node_acl {
545 char initiatorname[TRANSPORT_IQN_LEN];
546 /* Used to signal demo mode created ACL, disabled by default */
547 bool dynamic_node_acl;
548 bool acl_stop:1;
549 bool dynamic_stop;
550 u32 queue_depth;
551 u32 acl_index;
552 enum target_prot_type saved_prot_type;
553 #define MAX_ACL_TAG_SIZE 64
554 char acl_tag[MAX_ACL_TAG_SIZE];
555 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
556 atomic_t acl_pr_ref_count;
557 struct hlist_head lun_entry_hlist;
558 struct se_session *nacl_sess;
559 struct se_portal_group *se_tpg;
560 struct mutex lun_entry_mutex;
561 spinlock_t nacl_sess_lock;
562 struct config_group acl_group;
563 struct config_group acl_attrib_group;
564 struct config_group acl_auth_group;
565 struct config_group acl_param_group;
566 struct config_group acl_fabric_stat_group;
567 struct config_group *acl_default_groups[5];
568 struct list_head acl_list;
569 struct list_head acl_sess_list;
570 struct completion acl_free_comp;
571 struct kref acl_kref;
572 };
573
574 static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
575 {
576 return container_of(to_config_group(item), struct se_node_acl,
577 acl_group);
578 }
579
580 static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
581 {
582 return container_of(to_config_group(item), struct se_node_acl,
583 acl_attrib_group);
584 }
585
586 static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
587 {
588 return container_of(to_config_group(item), struct se_node_acl,
589 acl_auth_group);
590 }
591
592 static inline struct se_node_acl *param_to_nacl(struct config_item *item)
593 {
594 return container_of(to_config_group(item), struct se_node_acl,
595 acl_param_group);
596 }
597
598 static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
599 {
600 return container_of(to_config_group(item), struct se_node_acl,
601 acl_fabric_stat_group);
602 }
603
604 struct se_session {
605 unsigned sess_tearing_down:1;
606 u64 sess_bin_isid;
607 enum target_prot_op sup_prot_ops;
608 enum target_prot_type sess_prot_type;
609 struct se_node_acl *se_node_acl;
610 struct se_portal_group *se_tpg;
611 void *fabric_sess_ptr;
612 struct list_head sess_list;
613 struct list_head sess_acl_list;
614 struct list_head sess_cmd_list;
615 struct list_head sess_wait_list;
616 spinlock_t sess_cmd_lock;
617 struct kref sess_kref;
618 void *sess_cmd_map;
619 struct percpu_ida sess_tag_pool;
620 };
621
622 struct se_device;
623 struct se_transform_info;
624 struct scatterlist;
625
626 struct se_ml_stat_grps {
627 struct config_group stat_group;
628 struct config_group scsi_auth_intr_group;
629 struct config_group scsi_att_intr_port_group;
630 };
631
632 struct se_lun_acl {
633 u64 mapped_lun;
634 struct se_node_acl *se_lun_nacl;
635 struct se_lun *se_lun;
636 struct config_group se_lun_group;
637 struct se_ml_stat_grps ml_stat_grps;
638 };
639
640 struct se_dev_entry {
641 /* See transport_lunflags_table */
642 u64 mapped_lun;
643 u64 pr_res_key;
644 u64 creation_time;
645 u32 lun_flags;
646 u32 attach_count;
647 atomic_long_t total_cmds;
648 atomic_long_t read_bytes;
649 atomic_long_t write_bytes;
650 atomic_t ua_count;
651 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
652 struct kref pr_kref;
653 struct completion pr_comp;
654 struct se_lun_acl __rcu *se_lun_acl;
655 spinlock_t ua_lock;
656 struct se_lun __rcu *se_lun;
657 #define DEF_PR_REG_ACTIVE 1
658 unsigned long deve_flags;
659 struct list_head alua_port_list;
660 struct list_head lun_link;
661 struct list_head ua_list;
662 struct hlist_node link;
663 struct rcu_head rcu_head;
664 };
665
666 struct se_dev_attrib {
667 int emulate_model_alias;
668 int emulate_dpo;
669 int emulate_fua_write;
670 int emulate_fua_read;
671 int emulate_write_cache;
672 int emulate_ua_intlck_ctrl;
673 int emulate_tas;
674 int emulate_tpu;
675 int emulate_tpws;
676 int emulate_caw;
677 int emulate_3pc;
678 int pi_prot_format;
679 enum target_prot_type pi_prot_type;
680 enum target_prot_type hw_pi_prot_type;
681 int enforce_pr_isids;
682 int force_pr_aptpl;
683 int is_nonrot;
684 int emulate_rest_reord;
685 u32 hw_block_size;
686 u32 block_size;
687 u32 hw_max_sectors;
688 u32 optimal_sectors;
689 u32 hw_queue_depth;
690 u32 queue_depth;
691 u32 max_unmap_lba_count;
692 u32 max_unmap_block_desc_count;
693 u32 unmap_granularity;
694 u32 unmap_granularity_alignment;
695 u32 max_write_same_len;
696 u32 max_bytes_per_io;
697 struct se_device *da_dev;
698 struct config_group da_group;
699 };
700
701 struct se_port_stat_grps {
702 struct config_group stat_group;
703 struct config_group scsi_port_group;
704 struct config_group scsi_tgt_port_group;
705 struct config_group scsi_transport_group;
706 };
707
708 struct scsi_port_stats {
709 atomic_long_t cmd_pdus;
710 atomic_long_t tx_data_octets;
711 atomic_long_t rx_data_octets;
712 };
713
714 struct se_lun {
715 u64 unpacked_lun;
716 #define SE_LUN_LINK_MAGIC 0xffff7771
717 u32 lun_link_magic;
718 u32 lun_access;
719 bool lun_shutdown;
720 u32 lun_index;
721
722 /* RELATIVE TARGET PORT IDENTIFER */
723 u16 lun_rtpi;
724 atomic_t lun_acl_count;
725 struct se_device __rcu *lun_se_dev;
726
727 struct list_head lun_deve_list;
728 spinlock_t lun_deve_lock;
729
730 /* ALUA state */
731 int lun_tg_pt_secondary_stat;
732 int lun_tg_pt_secondary_write_md;
733 atomic_t lun_tg_pt_secondary_offline;
734 struct mutex lun_tg_pt_md_mutex;
735
736 /* ALUA target port group linkage */
737 struct list_head lun_tg_pt_gp_link;
738 struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
739 spinlock_t lun_tg_pt_gp_lock;
740
741 struct se_portal_group *lun_tpg;
742 struct scsi_port_stats lun_stats;
743 struct config_group lun_group;
744 struct se_port_stat_grps port_stat_grps;
745 struct completion lun_ref_comp;
746 struct completion lun_shutdown_comp;
747 struct percpu_ref lun_ref;
748 struct list_head lun_dev_link;
749 struct hlist_node link;
750 struct rcu_head rcu_head;
751 };
752
753 struct se_dev_stat_grps {
754 struct config_group stat_group;
755 struct config_group scsi_dev_group;
756 struct config_group scsi_tgt_dev_group;
757 struct config_group scsi_lu_group;
758 };
759
760 struct se_device {
761 #define SE_DEV_LINK_MAGIC 0xfeeddeef
762 u32 dev_link_magic;
763 /* RELATIVE TARGET PORT IDENTIFER Counter */
764 u16 dev_rpti_counter;
765 /* Used for SAM Task Attribute ordering */
766 u32 dev_cur_ordered_id;
767 u32 dev_flags;
768 #define DF_CONFIGURED 0x00000001
769 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
770 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
771 #define DF_USING_UDEV_PATH 0x00000008
772 #define DF_USING_ALIAS 0x00000010
773 #define DF_READ_ONLY 0x00000020
774 /* Physical device queue depth */
775 u32 queue_depth;
776 /* Used for SPC-2 reservations enforce of ISIDs */
777 u64 dev_res_bin_isid;
778 /* Pointer to transport specific device structure */
779 u32 dev_index;
780 u64 creation_time;
781 atomic_long_t num_resets;
782 atomic_long_t num_cmds;
783 atomic_long_t read_bytes;
784 atomic_long_t write_bytes;
785 /* Active commands on this virtual SE device */
786 atomic_t simple_cmds;
787 atomic_t dev_ordered_sync;
788 atomic_t dev_qf_count;
789 u32 export_count;
790 spinlock_t delayed_cmd_lock;
791 spinlock_t execute_task_lock;
792 spinlock_t dev_reservation_lock;
793 unsigned int dev_reservation_flags;
794 #define DRF_SPC2_RESERVATIONS 0x00000001
795 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
796 spinlock_t se_port_lock;
797 spinlock_t se_tmr_lock;
798 spinlock_t qf_cmd_lock;
799 struct semaphore caw_sem;
800 /* Used for legacy SPC-2 reservationsa */
801 struct se_node_acl *dev_reserved_node_acl;
802 /* Used for ALUA Logical Unit Group membership */
803 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
804 /* Used for SPC-3 Persistent Reservations */
805 struct t10_pr_registration *dev_pr_res_holder;
806 struct list_head dev_sep_list;
807 struct list_head dev_tmr_list;
808 struct workqueue_struct *tmr_wq;
809 struct work_struct qf_work_queue;
810 struct list_head delayed_cmd_list;
811 struct list_head state_list;
812 struct list_head qf_cmd_list;
813 struct list_head g_dev_node;
814 /* Pointer to associated SE HBA */
815 struct se_hba *se_hba;
816 /* T10 Inquiry and VPD WWN Information */
817 struct t10_wwn t10_wwn;
818 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
819 struct t10_alua t10_alua;
820 /* T10 SPC-2 + SPC-3 Reservations */
821 struct t10_reservation t10_pr;
822 struct se_dev_attrib dev_attrib;
823 struct config_group dev_group;
824 struct config_group dev_pr_group;
825 struct se_dev_stat_grps dev_stat_grps;
826 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
827 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
828 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
829 unsigned char udev_path[SE_UDEV_PATH_LEN];
830 /* Pointer to template of function pointers for transport */
831 const struct target_backend_ops *transport;
832 /* Linked list for struct se_hba struct se_device list */
833 struct list_head dev_list;
834 struct se_lun xcopy_lun;
835 /* Protection Information */
836 int prot_length;
837 /* For se_lun->lun_se_dev RCU read-side critical access */
838 u32 hba_index;
839 struct rcu_head rcu_head;
840 };
841
842 struct se_hba {
843 u16 hba_tpgt;
844 u32 hba_id;
845 /* See hba_flags_table */
846 u32 hba_flags;
847 /* Virtual iSCSI devices attached. */
848 u32 dev_count;
849 u32 hba_index;
850 /* Pointer to transport specific host structure. */
851 void *hba_ptr;
852 struct list_head hba_node;
853 spinlock_t device_lock;
854 struct config_group hba_group;
855 struct mutex hba_access_mutex;
856 struct target_backend *backend;
857 };
858
859 struct se_tpg_np {
860 struct se_portal_group *tpg_np_parent;
861 struct config_group tpg_np_group;
862 };
863
864 static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
865 {
866 return container_of(to_config_group(item), struct se_tpg_np,
867 tpg_np_group);
868 }
869
870 struct se_portal_group {
871 /*
872 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
873 *
874 * Negative values can be used by fabric drivers for internal use TPGs.
875 */
876 int proto_id;
877 /* Number of ACLed Initiator Nodes for this TPG */
878 u32 num_node_acls;
879 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
880 atomic_t tpg_pr_ref_count;
881 /* Spinlock for adding/removing ACLed Nodes */
882 struct mutex acl_node_mutex;
883 /* Spinlock for adding/removing sessions */
884 spinlock_t session_lock;
885 struct mutex tpg_lun_mutex;
886 struct list_head se_tpg_node;
887 /* linked list for initiator ACL list */
888 struct list_head acl_node_list;
889 struct hlist_head tpg_lun_hlist;
890 struct se_lun *tpg_virt_lun0;
891 /* List of TCM sessions associated wth this TPG */
892 struct list_head tpg_sess_list;
893 /* Pointer to $FABRIC_MOD dependent code */
894 const struct target_core_fabric_ops *se_tpg_tfo;
895 struct se_wwn *se_tpg_wwn;
896 struct config_group tpg_group;
897 struct config_group *tpg_default_groups[7];
898 struct config_group tpg_lun_group;
899 struct config_group tpg_np_group;
900 struct config_group tpg_acl_group;
901 struct config_group tpg_attrib_group;
902 struct config_group tpg_auth_group;
903 struct config_group tpg_param_group;
904 };
905
906 static inline struct se_portal_group *to_tpg(struct config_item *item)
907 {
908 return container_of(to_config_group(item), struct se_portal_group,
909 tpg_group);
910 }
911
912 static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
913 {
914 return container_of(to_config_group(item), struct se_portal_group,
915 tpg_attrib_group);
916 }
917
918 static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
919 {
920 return container_of(to_config_group(item), struct se_portal_group,
921 tpg_auth_group);
922 }
923
924 static inline struct se_portal_group *param_to_tpg(struct config_item *item)
925 {
926 return container_of(to_config_group(item), struct se_portal_group,
927 tpg_param_group);
928 }
929
930 struct se_wwn {
931 struct target_fabric_configfs *wwn_tf;
932 struct config_group wwn_group;
933 struct config_group *wwn_default_groups[2];
934 struct config_group fabric_stat_group;
935 };
936
937 static inline void atomic_inc_mb(atomic_t *v)
938 {
939 smp_mb__before_atomic();
940 atomic_inc(v);
941 smp_mb__after_atomic();
942 }
943
944 static inline void atomic_dec_mb(atomic_t *v)
945 {
946 smp_mb__before_atomic();
947 atomic_dec(v);
948 smp_mb__after_atomic();
949 }
950
951 #endif /* TARGET_CORE_BASE_H */
Linux with added FPC-III support